@misc{indiciae33ecafb43597,
  title = {Mining Claim Activity on Federal Land for the Period 1976 through 2003},
  author = {J. Douglas Causey},
  year = {2005},
  doi = {10.3133/ds124},
  url = {https://pubs.usgs.gov/publication/ds124},
  note = {Source identifier: ds124}
}